SDC Capital Partners acquired a stake in Summit Infrastructure Group, which provides custom network solutions and bandwidth infrastructure services using its dense and unique fiber-optic network located throughout key markets in Virginia. Current majority owner Columbia Capital will continue to retain a material ownership stake in SummitIG following completion of the transaction. Financial terms were not disclosed. "We are excited to partner with SDC on our next phase of growth," said Bill Cook, SummitIG's CEO. "We believe that SDC's deep operational expertise and understanding of communications infrastructure will accrue to our benefit as we expand our current platform in Northern Virginia and enter new markets to meet the growing needs of our customers."